Window adapter for stove flue pipe



FIG. 1 is a front perspective view of the window adapter showing my/our new design;

FIG. 2 is a right side elevation view of the window adapter;

FIG. 3 is an elevation view of the rear side of the window adapter showing the central circular through opening for the stove flue pipe; and

FIG. 4 is a bottom plan view of the window adapter. 

The ornamental design for a window adapter for stove flue pipe, substantially as shown. 